The present invention relates to a laundry washing machine, in particular a front loading washing machine, and to a dispenser of washing agents for a washing machine.
In the case of laundry washing machines, the washing agent dispenser usually comprises a drawer subdivided into a series of compartments, each of which is destined to be loaded with a dose of detergent and/or additive to be used in a respective phase of the washing program or cycle. The aforesaid drawer is slidably housed in a housing space, defined in the upper part of the machine cabinet and having a hopper-like bottom, a tube connecting the hopper-like bottom with the washing tub.
The drawer is movable between a first position, for loading the desired washer agent or agents, and a second position, for withdrawing the washing agents by means of a flow of water; in the two positions, the drawer is for the most part respectively extracted from or inserted into the respective housing space, the shift from the first to the second position, and vice versa, being conducted manually.
In the withdrawal or working position, each of the compartments of the drawer can be traversed by a flow of water which drives the washing agents into the tub, by means of the aforesaid hopper-like bottom and the respective tube connecting to the tub. Depending on the type of load of the laundry to be washed, the user therefore selects a washing program and places into the various compartment of the drawer the recommended quantities of the required washing agents; at the appropriate time, upon command from the control system (which can be electromechanical or electronic) of the machine, the water to be loaded into the washing tub of the machine is made to transit selectively through each of the various compartments, to drive into the tub the related washing agent; in other words, then, based on the selected program, and depending on the washing phases reached, the control system causes the different washing agents to be withdrawn from the related compartments at the appropriate times.
The object of the present invention is to obtain a dispenser of washing agents of new conception for a washing machine, that is simple and convenient to use, has precise and reliable operation, is easy to construct and has low cost.
These and other objects are achieved, according to the present invention, by a laundry washing machine, in particular with front loading, and by a dispenser of washing agents having the characteristics of the appended claims, which are understood to be an integral part of the present description.
Additional objects, characteristics and advantages of the present invention shall become readily apparent from the detailed description that follows and from the accompanying drawings, provided purely by way of explanatory and non limiting example, in which:
In
The opening of the cabinet 2 in which the door 3 is operative faces a homologous opening present in the front wall of the washing tub of the machine 1; as in the prior art, the front opening of the tub in turn faces a corresponding opening defined in the front part of the drum in the machine 1; in this way, with the door 3 open, the laundry can be loaded into the drum or be unloaded therefrom. Between the front part of the cabinet 2 and the opening of the tub are provided suitable sealing means, such as a gasket with substantially annular and/or tapered shape, which ends in correspondence with the opening of the drum.
Also in
In the embodiment exemplified in the figures, the dispenser of washing agents of the invention is mounted in correspondence with the lower edge of the front opening of the cabinet 2, in such a way as to project towards the interior of the cabinet itself, and in particular in the space delimited by the aforesaid gasket. An arrangement substantially of this kind is described for example in EP-A-655 523.
With reference also to
In the front wall of the half-shell 11B slits 19 are formed through which, as will be illustrated below, the water with a washing agent added thereto is loaded directly into the drum of the machine, exploiting the presence of the aforesaid gasket. From the bottom wall of the half-shell 11B three support brackets 20, 21 and 22 elevate centrally, each having a circular hole in the respective top area. On the upper edge of each of the two lateral walls of the half-shell 11B a respective semicircular recess 23 is defined; similar recesses, not shown herein, are defined on the lower edge of each of the two lateral walls of the upper half-shell 11A; in this way, following the coupling between the two half-shells 11A, 11B, the recesses 23 thereof form seats with circular section, which are substantially coaxial to the holes present in the brackets 20, 21 and 22.
From the coupling 17 of the bottom wall of the half-shell 11B two conduits 24 and 25 elevate, having substantially quadrangular section. Each of the conduits 24 and 25 has a respective substantially rectilinear segment or stretch and an arched terminal segment or stretch, developing for about 90°. Following the coupling of the distributor 18 on the respective coupling 17 (see for example
The references 26A and 26B designates a first and a second identical, which are identical, for a respective washing agent, in particular a bleach and a washing additive or softener. Each container 26A, 26B is shaped substantially as a cone frustum and has on the respective circumferential wall a loading opening 27 and an outflow slit 28, positioned at about 90° from each other. On the larger lateral wall of each container 26A, 26B there is defined a projecting area bearing a pivot with circular section, designated 31 in
On the wall of each container 26A, 26B provided with the pivot 31 a channel 33 is also formed, having slightly larger section dimension than the conduit 24 or 25. The channel 33 has an arched development, of about 90°, and is open at its lower end oriented towards the distributor 18 (see
In the initial segment or stretch of the channel 33, in proximity with the inlet, an outlet port is provided, which places the channel in communication with the interior of the respective container 26A, 26B. The aforesaid port is designated 34 in
On the circumferential wall of each container 26A, 26B two projections 35, 36 are also provided; as will become readily apparent hereafter, the projection 35 is provided to constitute a stop to the angular movement of the respective container 26A, 26B, whilst the projection 36 is provided to achieve the manual actuation of the respective container 26A, 26B, by means of a door of the dispenser 10, described hereafter.
The reference number 40 designates a third container of a washing agent, in particular a washing detergent. The container 40 has substantially cylindrical shape and on its respective circumferential wall it has a loading opening 41 and a series of outflow slits 42, the former being positioned at about 90° from the latter. On a lateral wall of the container 40 a pivot 43 is defined, with circular section, shown in
On the wall of the container 40 provided with the pivot 44 a channel 45 is also defined, whose section is similar to that of the channels 33 of the containers 26A, 26B. The channel 45 thus also has an arched development, of about 90°, an end inlet and an outlet port similar to the one previously designated as 34; said outlet port of the channel 45 is designated as 46 in
On the circumferential wall of the container 40 a first projection 47 is provided, serving a similar function to that of the projections 35 of the containers 26A, 26B; the container 40 also has a second projection, designated 48 in
The reference number 60 globally designates an angularly movable door, having substantially semi-circular section, provided to occlude the openings 12, 13, 14 present in the half-shell 11A.
From the lower surface of the door 60 two brackets originate, designated 61 and 62, each provided with a through hole and destined to co-operate with the projections 31 and 44 of the containers 26A, 26B and 40, as well as with the brackets 20, 21, 22 which rise from the bottom of the half-shell 11B. In the upper surface of the door 60 a grip point 63 is provided; in correspondence with a longitudinal end of the door 60 a projection is also provided, defining a cam profile, designated 64, destined to co-operate with the rod 16, as shown also in
For purposes of assembling the dispenser 10, the lateral pivots 43 and 44 of the container 10 are inserted into the holes of the brackets 61, 62 of the door 60; the part of said pivots 43, 44 projecting from the brackets of the cover 60 is then inserted into the holes of the brackets 20 and 21; in this step, the channel 45 of the container 40 is inserted on the conduit 25. Subsequently, the pivot 31 of the container 26A is inserted into the blind seat formed in the pivot 44 of the container 40, whilst the pivot 32 of the container 26A is placed in the respective recess 23 defined on the upper edge of the half-shell 11B; in this step, the channel 33 of the container 26A is inserted on the conduit 24. On the other side, the pivot 31 of the container 26B is inserted into the through hole of the bracket 22, whilst the pivot 32 of the container 26B is placed in the respective recess 23 defined on the upper edge of the half-shell 11B; in this step, the channel 33 of the container 26B is inserted on the respective conduit similar to those designated as 24, 25 (as stated, the conduit related to the channel 33 of the container 26B is not shown for the sake of greater clarity). The spring 70 is anchored between the door and the bracket 22. At this point, to the half-shell 11B is coupled the half-shell 11A, provided with the respective rod 16. The distributor 18 is fastened to the inner surface of the front wall of the cabinet 2, 2A and to the union fittings 18A, 18B (and to the one related to the conduit that is not shown herein) are connected the respective water supply pipes. Into the distributor 18 the respective fitting 17 of the body 11 is then coupled.
As a result of the aforesaid mounting, the individual containers 26A, 26B and 40 are pivotally supported within the body 11 of the dispenser, i.e. capable of moving angularly according to an axis X (see
The operation of the dispenser 10 is as follows.
For the purposes of the laundry to be washed in the drum of the machine 1, the door 3 is opened, to assume the position shown in
The desired dose of soap, necessary for the washing operation, is then inserted into the container 40; into the container 26B the desired dose of softener may be inserted; if provided, alternatively to the loading of the container 40, the desired dose of bleach is inserted into the container 26A. Note that, given the position of the outflow slits 32, 42, substantially orthogonal to the loading openings 27, 41 of the respective containers 26A, 26B and 40, the washing agents inserted do not flow out of the containers.
In this condition, the rod 16 projects prevalently from the body 11, its end inside the body bearing on a first part of the cam profile 64, as shown in
During the closing of the door 3, the part 3B comes in contact with the head of the rod 16, thrusting the rod towards the interior of the body 11; the opposite end of the rod 16 is thus pressed on the cam profile 64, causing its motion, until it reaches the position shown in
At a certain point of the wash cycle being carried out, the control system of the machine 1 commands the step of withdrawing the washing agent of interest from the respective container, which here is presumed to be the container 26A. Essentially, in this step, the control system commands the opening of a solenoid valve operative along the pipe that carries water to the union fitting 18A of the distributor 18. The flow of water, indicated by the arrow IN of
The pressure of the water flowing in so determines the angular movement of the container 26A, until assuming the position shown in
As a result of the rotation of the container obtained by means of the water pressure, as described above, the slits 28 or 43 of the container 26A, 26B or 40 are now oriented towards the bottom of the body 11. The water flowing in from the port 34 or 46 can mix with the washing agent present in the respective container and then flow out with the agent itself through the slits 28, 43 on the bottom of the body 11, which is slightly inclined downwards; the water-washing agent mixture can thus flow out of the body 11 through the slits 19, in the area of the gasket between the front wall of the cabinet 2 and the washing tub, to be conveyed through said gasket directly into the mouth of the drum of the machine 1.
Note that the flow of water carried to the container 26A, 26B or 40 continues for a certain period of time, certainly longer than that necessary to remove the washing agent; the container and the interior of the body 11 are thereby thoroughly washed. The water needed to carry out one or more successive steps of the cycle which do not provide for the use of detergent (for example, the first rinsing step) can equally be made to transit through the dispenser 10, as described above.
In a particularly advantageous embodiment, the fitting 17 can be manually separated from the distributor 18, i.e. extractable therefrom, to enable the user completely to remove the body 11 of the dispenser from the machine 1, in order to conduct a thorough periodic cleaning, for instance in a sink.
At the end of the wash cycle, the laundry can be extracted from the machine, after opening the door 3; in this situation, the door 60 of the dispenser 10 is still kept shut by the spring 70, in spite of the fact that the rod 60 is no longer pressed against the cam profile 64; the container or containers 26A, 26B and 40 are still in the position shown in
For purposes of loading the washing agent or agents to carry out a new operating cycle of the machine 1, the user manually opens the door 60, acting on the respective grip 63. In this way, the door 60 is moved angularly, clockwise, until the grip itself abuts against the edge of the upper opening 13 of the body 11, as shown for example in
From the above description, the characteristics and the advantages of the present invention are readily apparent.
The described dispenser is convenient and simple to operate for the user, who simply carries out the operations of loading the washing agents of interest, since the compartment or compartments containing the washing agent are “automatically” moved from the respective loading position to the dispensing position, directly by the flow of the water used to wash the laundry. Practical tests conducted have also allowed to verify that the dispenser described herein has a precise and reliable operation.
The presence of the system constituted by the spring 70, which is capable of assuming two stable working positions (
A substantial advantage of the invention is that, by virtue of the type of operation and movement of the containers 26A, 26B and 40, there is no need to provide the typical siphons of known drawer dispensers, which are always a critical elements.
An additional advantage of the invention is that the water—washing agent mixture can come directly and rapidly in contact with the laundry, guided by the aforesaid gasket which extends between the opening of the cabinet and the mouth of the drum: the risk is thereby avoided of an accumulation in the lower space between tub and drum, ending in the drain conduit, as occurs instead in traditional laundry washing machines. In other words, according to the invention, the distributor of washing agents 10 has a functionality that is very similar to the one obtained with the use of containers, or so-called “balls”, to be inserted in the drum together with the laundry.
Nearly all the components of the dispenser can be obtained by simple moulding operations of thermoplastic material, with evident advantages in terms of cost reduction.
It is clear that numerous variants are possible to the laundry washing machine and to the washing agent dispenser described by way of example, without thereby departing from the scope of novelty of the inventive idea, and it is also clear that in the practical embodiment of the invention, the shapes, dimensions, materials and components used may differ from those indicated above by way of example, and replaced by technically equivalent elements.
For example, although the provision of the rod 16 and of the respective cam profile 64 of the door 60 is advantageous, it must be considered optional, since the door 60 could be closed manually, with an opposite manoeuvre to the opening operation described above.
The sliding coupling between the channels 33, 45 of the containers 26A, 26B, 40 with the respective conduits 24, 25 could be inverse relative to the one exemplified herein, i.e. with the channels inserted in the conduits.
In alternative embodiments, the dispenser according to the invention could be positioned in different points of the machine from the one described above, for example in a housing defined in the upper part of the cabinet 2.
Number | Date | Country | Kind |
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TO2003A0066 | Apr 2003 | IT | national |
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Number | Date | Country | |
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20040216499 A1 | Nov 2004 | US |